CINDECA   05422
CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
artículos
Título:
Transesterification of -ketoesters catalyzed by hybrid materials based on silica sol-gel
Autor/es:
G. SATHICQ; L. MUSANTE; G. ROMANELLI; G. PASQUALE; J. AUTINO; H. THOMAS; P. VÁZQUEZ
Revista:
CATALYSIS TODAY
Editorial:
Elsevier
Referencias:
Año: 2008 vol. 133 p. 455 - 455
ISSN:
0920-5861
Resumen:
This work shows an alternative process for β-ketoester transesterification using new silica-based hybrid materials as heterogeneous catalysts. The catalysts were synthesized using silica and 3-aminopropyltriethoxysilane or 1,1,1,3,3,3-hexamethyldisilazane as functionalizating agents. β-Ketoesters and alcohols were transesterified in refluxing toluene with reaction times between 4 h and 14 h. Different ketoesters with good performance were obtained. The influence of the catalysts and starting materials on the reaction rate was studied. In all cases, coproduct formation was not observed; the catalysts were recovered and reused without loss of catalytic activity
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